It's not an argument at all. Weight and mass are simply not identical.
I introduced the weightlessness of astronauts to illustrate the difference between weight and mass and as a way to aid understanding of that difference.
Ah, you may imagine that about other indicators but that is putting your own words into the sentences.
In any case, other factors are not just significant. They are determining factors. Without mass there would be no kinetic energy.
KE = 0.5mv2
No m, no KE.
And I'm pretty sure that the author knows that.



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